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超導磁共振主磁體勵磁測控系統設計與開(kāi)發(fā)
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(中國計量大學(xué) 信息工程學(xué)院 生物醫學(xué)工程研究所,杭州 310018)[HJ1.54mm]

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余相泉(1994-),男,浙江省衢州市人,碩士研究生,主要從事磁共振系統測試、圖像重建方向的研究。 通訊作者:朱建明(1963-),男,教授,碩士,博士研究生導師,主要從事磁共振系統及醫學(xué)物理方向的研究。 [FQ)]

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Design and Development of a Magnetic Field Ramping Control and Measurement System for Superconducting MRI
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(Department of Biomedical Engineering,China Jiliang University,Hangzhou 310018,China)[JZ)]

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    摘要:

    醫用超導磁共振主磁體在勵磁過(guò)程中出現的交流損耗和傳導漏熱等情況,是超導磁體失超的根本原因;為了控制和保證勵磁過(guò)程的穩定性、可靠性和安全性,開(kāi)發(fā)和完善勵磁的測控系統就顯得格外重要;設計并開(kāi)發(fā)了基于LabVIEW平臺的超導磁共振主磁體勵磁測控系統;系統數據通過(guò)在虛擬儀器平臺上調用動(dòng)態(tài)鏈接庫文件(DLL),控制泰克公司KE2700系列集成式采集卡采集得到;傳感器選擇根據相應功能需要配置;操作臺儀器控制、數據采集程序和人機界面由LabVIEW編寫(xiě);搭配保護電路,保護超導線(xiàn)圈,降低失超損失;實(shí)現數據采集、參數控制、失超保護、勻場(chǎng)測試等功能。系統滿(mǎn)足設計開(kāi)發(fā)目的,平臺搭建穩定可靠;功能相對完善,具體操作簡(jiǎn)易,交互界面友好,后期修改和功能擴展靈活;經(jīng)工程實(shí)際運行測試驗證,提高了研究和工作效率,達到設計要求,有實(shí)際應用價(jià)值。

    Abstract:

    AC loss and conduction heat leakage are the main cause of magnetic quench during magnetic field ramping for superconducting MRI systems. In order to maintain the stability and safety of field ramping process, it is important to have a well-designed field ramping control and measurement system. In this study, a field ramping control and measurement system was designed and developed using the LabVIEW platform. System data were acquired through using dynamic linked library, DLL-controlled Tektronix KE2700 system. The selection of transducers was based on required system functionality and specification. System control platform, data acquisition program and user interface (UI) was developed on workstation using LabVIEW with easy modification of acquisition parameters through UI. Quench protection resistance can protect the superconducting coil from loss of energy, and loss of superconductivity. System met the design requirement, and the established platform was stable and reliable, with relatively complete functionality. System is easy to operate, with user-friendly interface, and easy for future expansion and debugging. After detailed engineering test and practice, it was shown that the system design and application requirement can be met, and system design goals were achieved. With its improved efficiency, this study has great value in actual application for superconducting magnets.

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引用本文

余相泉,朱建明.超導磁共振主磁體勵磁測控系統設計與開(kāi)發(fā)計算機測量與控制[J].,2017,25(5):7-9, 17.

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歷史
  • 收稿日期:2016-11-21
  • 最后修改日期:2017-01-05
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  • 在線(xiàn)發(fā)布日期: 2017-05-31
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